Nope. There is a reason pitchers pitch on their off days, and chart pitches on their off days, and rest on their off days. I'd guess the cycle is nearly identical (within an org) for each pitcher. It's not random that they have these cycles, teams believe that this works for their players. Disrupting that by adding more batting practice, base running, fielding, etc....that's a disruption to a routine that MiLB and MLB have in place.